guayule


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guayule

(wīyo͞o`lē, gwä–), multibranched flowering evergreen shrub, Parthenium argentatum, native to the deserts of the SW United States and N Mexico. Growing to 3 ft (1 m) in height, the guayule has leaves and outer stems that are covered with silvery hairs; its small yellow-white composite flowers are produced in clusters. Sometimes used as a landscape plant in dry areas, the shrub has been primarily of interest, since the early 1900s, as an alternative source of rubber, and was widely planted for that purpose in California and the Southwest during World War II. The rubber produced from the latex found in the bark of the stems is used in a number of products, including gloves for individuals allergic to latex from the Pará rubber treePará rubber tree
, large tree (Hevea brasiliensis) of the family Euphorbiaceae (spurge family), native to tropical South America and the source of the greatest amount and finest quality of natural rubber.
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. Resin from the shrub is used as a wood preservative, and pulp from processing is used in particle board. The guayule is classified in the division MagnoliophytaMagnoliophyta
, division of the plant kingdom consisting of those organisms commonly called the flowering plants, or angiosperms. The angiosperms have leaves, stems, and roots, and vascular, or conducting, tissue (xylem and phloem).
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, class Magnoliopsida, order Asterales, family Asteraceae.

Guayule

 

(Parthenium argentatum), a rubber-bearing plant of the family Compositae. It grows in the deserts of the northern part of the Mexican plateau, as high as 2,000 m above sea level, and in Texas. It is an evergreen, heavily branched semishrub, reaching a height of 1 m, with a long branched tap root and numerous surface side roots. The leaves measure about 5-8 cm long, with pointed or lobed edges that may be notched or feathered, and contain 3-5 paired lobes. The long cauliform peduncles carry 7-30 small heads of flowers. The leaves, stems, and annual branches are covered with short, thick, silvery hairs. Rubber is found in the roots and the branches. Guayule also contains resin and ester oils.

guayule

[wī′yü·lē]
(botany)
Parthenium argentatum. A subshrub of the family Compositae that is native to Mexico and the southwestern United States; it has been cultivated as a source of rubber.
References in periodicals archive ?
Chapman at the Western Regional Research Center in Albany, and former Albany researcher Javier Castillon, developed a faster, easier way to move new genes into guayule tissue in the lab.
As part of Yulex's global licensing program, which has started with ENI's Versalis in Europe, licensees will have access to commercial quantities of guayule seeds developed by the Yulex Center to establish crops in new regions.
Latex is contained in the parenchyma cells in guayule.
Downloadable photos of Guayule from the USDA available: http://www.
The surest way to get a field of guayule established is to transplant seedlings that were started in greenhouses.
These results indicate that proteins present in production lots of Guayule latex are not cross-reactive with Hevea brasiliensis latex allergens.
Yulex and the University of Arizona will apply classical breeding along with modern tools for marker assisted breeding to Guayule lines to select traits for the crop improvement program.
The four-year grant focuses on research efforts aimed at developing enhanced manufacturing processes, testing and utilizing of guayule natural rubber as a strategic raw material in tires, and evaluating the remaining biomass of the guayule plant as a source of bio-fuel for the transportation industry.
Yulex's biorubber material is made from guayule, a renewable, non-food crop that requires very little water, is grown domestically in the US, uses no pesticides, and in comparison to traditional neoprene, has a very clean manufacturing process.
The news that Bridgestone was developing a guayule research farm and processing center near Mesa, AZ is deja vu all over again.
26, 2012 /PRNewswire/ -- Rubber and tire industry executives and onlookers at the International Tire Exhibition and Conference were given a glimpse into the future Wednesday morning as PanAridus CEO, Michael Fraley, announced the company was publicly releasing the first samples of domestically produced guayule rubber to manufacturers.
The four-year grant will focus on research efforts aimed at developing enhanced manufacturing processes, testing and utilization of guayule natural rubber as a strategic source of raw materials in tires, and evaluating the remaining biomass of the guayule plant as a source of bio-fuel for the transportation industry.